/* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU GPL (v>=2)
 * and comes with ABSOLUTELY NO WARRANTY!
 * See LICENSE.txt for details.
 */
#include "createinstallerdialog.h"
#include <QDebug>
#include <QTextEdit>
#include <QDir>
#include <QPushButton>
#include <QGroupBox>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QLabel>
#include <QFileDialog>
#include <QSettings>
#include <QStyle>
#include <QApplication>
#include <QMessageBox>

CreateInstallerDialog::CreateInstallerDialog(QMainWindow *parent) :
    QDialog(parent),
    mProgress(this)
{
    QSettings settings;
    setWindowTitle(tr("Create binary installer"));
    setupGUI();
    resize(500, 250);
    mCertFile->setText(settings.value("CodeSignCert", QString()).toString());
    mBinaryFolder->setText(settings.value("LastBinaryFolder", QString()).toString());
    mSaveFile->setText(settings.value("LastBinOutputFolder", QString()).toString());

    connect(&mNSISProc, SIGNAL(finished(int, QProcess::ExitStatus)),
            this, SLOT(processFinished(int, QProcess::ExitStatus)));
    connect(&mNSISProc, SIGNAL(error(QProcess::ProcessError)),
            this, SLOT(processError(QProcess::ProcessError)));
}

void CreateInstallerDialog::setupGUI()
{
    /* Top level layout / widgets */
    QVBoxLayout *topLayout = new QVBoxLayout;
    QVBoxLayout *headerLayout = new QVBoxLayout;
    QHBoxLayout *headerSubLayout = new QHBoxLayout;
    QHBoxLayout *centerLayout = new QHBoxLayout;
    QHBoxLayout *bottomLayout = new QHBoxLayout;
    QVBoxLayout *labelLayout = new QVBoxLayout;
    QVBoxLayout *fieldLayout = new QVBoxLayout;
    QVBoxLayout *buttonLayout = new QVBoxLayout;

    QLabel *header = new QLabel("<h3>" + tr("Create binary installer") + "</h3>");
    QLabel *description = new QLabel(
        tr("Create and sign a TrustBridge binary installer."));
    headerSubLayout->insertSpacing(0, 40);
    headerSubLayout->addWidget(description);
    QFrame *headerSeparator = new QFrame();
    headerSeparator->setFrameShape(QFrame::HLine);
    headerSeparator->setFrameShadow(QFrame::Sunken);
    headerLayout->addWidget(header);
    headerLayout->addLayout(headerSubLayout);
    headerLayout->addWidget(headerSeparator);
    headerLayout->insertSpacing(4, 10);

    QLabel *archiveLabel = new QLabel(tr("Select binary folder:"));
    QLabel *certLabel = new QLabel(tr("Select code signing certificate:"));
    QLabel *saveLabel = new QLabel(tr("Select output folder:"));
    labelLayout->addWidget(archiveLabel);
    labelLayout->addWidget(certLabel);
    labelLayout->addWidget(saveLabel);

    mBinaryFolder = new QLineEdit();
    mCertFile = new QLineEdit();
    mSaveFile = new QLineEdit();
    fieldLayout->addWidget(mBinaryFolder);
    fieldLayout->addWidget(mCertFile);
    fieldLayout->addWidget(mSaveFile);

    QPushButton *archiveSelect = new QPushButton("...");
    connect(archiveSelect, SIGNAL(clicked()), this, SLOT(openFolderSelect()));
    archiveSelect->setFixedWidth(30);
    QPushButton *certSelect = new QPushButton("...");
    connect(certSelect, SIGNAL(clicked()), this, SLOT(openCertificateSelect()));
    certSelect->setFixedWidth(30);
    QPushButton *saveSelect = new QPushButton("...");
    connect(saveSelect, SIGNAL(clicked()), this, SLOT(openSaveLocation()));
    saveSelect->setFixedWidth(30);
    buttonLayout->addWidget(archiveSelect);
    buttonLayout->addWidget(certSelect);
    buttonLayout->addWidget(saveSelect);

    centerLayout->addLayout(labelLayout);
    centerLayout->addLayout(fieldLayout);
    centerLayout->addLayout(buttonLayout);

    QPushButton *create = new QPushButton(tr("Create installer"));
    connect(create, SIGNAL(clicked()), this, SLOT(createInstaller()));
    QPushButton *cancel = new QPushButton(tr("Cancel"));
    connect(cancel, SIGNAL(clicked()), this, SLOT(close()));
    bottomLayout->insertStretch(0, 10);
    bottomLayout->addWidget(create);
    bottomLayout->addWidget(cancel);

    QFrame *bottomSeparator = new QFrame();
    bottomSeparator->setFrameShape(QFrame::HLine);
    bottomSeparator->setFrameShadow(QFrame::Sunken);

    topLayout->addLayout(headerLayout);
    topLayout->addLayout(centerLayout);
    topLayout->insertStretch(2, 10);
    centerLayout->insertSpacing(3, 10);
    topLayout->addWidget(bottomSeparator);
    topLayout->addLayout(bottomLayout);

    setLayout(topLayout);

    mProgress.setWindowModality(Qt::WindowModal);
    mProgress.setLabelText(tr("Creating installer package..."));
    mProgress.setCancelButton(0);
    mProgress.setRange(0,0);
    mProgress.setMinimumDuration(0);

    return;
}

void CreateInstallerDialog::openCertificateSelect()
{
    QSettings settings;
    QString certFile = QFileDialog::getOpenFileName(
        this, tr("Select certificate"),
        mCertFile->text().isEmpty() ? QDir::homePath() : mCertFile->text(),
        "*.pem *.der *.crt");
    settings.setValue("CodeSignCert", certFile);
    mCertFile->setText(certFile);
}

void CreateInstallerDialog::openFolderSelect()
{
    QSettings settings;
    QString archiveFolder = QFileDialog::getExistingDirectory(
        this, tr("Select binary folder"),
        mBinaryFolder->text().isEmpty() ? QDir::homePath() : mBinaryFolder->text());
    mBinaryFolder->setText(archiveFolder);
    settings.setValue("LastBinaryFolder", archiveFolder);
}

void CreateInstallerDialog::openSaveLocation()
{
    QSettings settings;
    QString saveFile = QFileDialog::getExistingDirectory(
        this, tr("Select target location"),
        mSaveFile->text().isEmpty() ? QDir::homePath() : mSaveFile->text());
    mSaveFile->setText(saveFile);
    settings.setValue("LastBinOutputFolder", saveFile);
}

void CreateInstallerDialog::showErrorMessage(const QString &msg)
{
    QMessageBox::warning(this, tr("Error!"), msg);
}

void CreateInstallerDialog::processFinished(int exitCode, QProcess::ExitStatus exitStatus)
{
    FinishedDialog *fin = new FinishedDialog(0, tr("Created installer in %1.")
            .arg(mBinaryFolder->text()), mNSISProc.readAll(), false);
    qDebug() << "Finished: " << mNSISProc.readAll();
    mProgress.cancel();
    fin->show();
    close();
}

void CreateInstallerDialog::processError(QProcess::ProcessError error)
{
    qDebug() << "Error: " << mNSISProc.readAll();
    mProgress.cancel();
}

void CreateInstallerDialog::createInstaller()
{
    QDir binDir(mBinaryFolder->text());
    QDir outDir(mSaveFile->text());
    if (mBinaryFolder->text().isEmpty() || !binDir.exists()) {
        showErrorMessage(tr("Please select an existing input folder."));
        return;
    }
    if (mCertFile->text().isEmpty()) {
        showErrorMessage(tr("Please select a codesigning certificate."));
        return;
    }
    if (mSaveFile->text().isEmpty() || !outDir.exists()) {
        showErrorMessage(tr("Please select a output folder."));
        return;
    }
    QSettings options(binDir.filePath("meta.ini"), QSettings::IniFormat);
    options.sync();
    QStringList keys = options.allKeys();
    if (options.status() != QSettings::NoError || keys.size() < 1) {
        showErrorMessage(tr("Folder %1 does not appear to contain a meta.ini")
                .arg(binDir.path()));
        return;
    }

    /* Copy windows directory contents to tmpdir */
    QStringList arguments;
    mNSISProc.setProgram("makensis");
    mNSISProc.setProcessChannelMode(QProcess::MergedChannels);
    mNSISProc.setWorkingDirectory(outDir.path());
    arguments << QString::fromLatin1("-Dfiles_dir=") + binDir.path() + "/windows";
    foreach (const QString &key, keys) {
        arguments << QString::fromLatin1("-D%1=%2").arg(key,
                options.value(key, QString()).toString());
    }

    arguments << binDir.path() + "/trustbridge.nsi";

    qDebug() << "Starting makensis with arguments: " << arguments;
    mNSISProc.setArguments(arguments);
    mNSISProc.start();
    mProgress.show();

    if (!mNSISProc.waitForStarted() ||
        mNSISProc.state() == QProcess::NotRunning) {
        showErrorMessage(tr("Failed to start makensis.\n"
            "Please ensure that makensis is installed and in your PATH variable."));
    }
}

FinishedDialog::FinishedDialog(QDialog *parent,
        QString msg, QString details, bool isErr):
    QDialog(parent)
{
    QVBoxLayout *topLayout = new QVBoxLayout;
    QHBoxLayout *buttonLayout = new QHBoxLayout;
    QLabel *msgLabel = new QLabel;
    QTextEdit *detailsWindow = new QTextEdit;

    detailsWindow->insertPlainText(details);
    detailsWindow->setReadOnly(true);
    detailsWindow->hide();

    if (!isErr) {
        setWindowTitle(tr("Success!"));
        msgLabel->setPixmap(QApplication::style()->standardIcon(
                    QStyle::SP_MessageBoxInformation).pixmap(16, 16));
    } else {
        setWindowTitle(tr("Error!"));
        msgLabel->setPixmap(QApplication::style()->standardIcon(
                    QStyle::SP_MessageBoxCritical).pixmap(16, 16));
    }
    msgLabel->setText(msg);

    topLayout->addWidget(msgLabel);
    topLayout->addWidget(detailsWindow);
    QPushButton *detailsBtn = new QPushButton(tr("Details"));
    connect(detailsBtn, SIGNAL(clicked()), detailsWindow, SLOT(show()));
    buttonLayout->addWidget(detailsBtn);

    QPushButton *okBtn = new QPushButton(tr("OK"));
    okBtn->setIcon(QApplication::style()->standardIcon(QStyle::SP_DialogOkButton));
    connect(okBtn, SIGNAL(clicked()), this, SLOT(close()));
    buttonLayout->insertStretch(0, 100);
    buttonLayout->addWidget(okBtn);

    topLayout->addLayout(buttonLayout);
    setLayout(topLayout);
}